The sports minister, Hugh Robertson, has said any move by Fifa to facilitate the release of controversial documents relating to $100m bribery allegations would be a welcome first sign of greater transparency.

But he warned that the credibility of the Fifa president, Sepp Blatter, was on the line ahead of the pivotal executive committee meeting on Thursday and that the organisation had a long way to go to root out corruption and reform its corporate governance.

Blatter will put a series of reforms before his executive committee in a bid to claim that his zero tolerance rhetoric is being backed up by action.

Some advisers are urging him to draw a line under the past by making the case to his executive committee for the release of court documents alleged to show senior Fifa officials accepted bribes from its former marketing company ISL.

"I would welcome the release of the documents. Fifa's credibility in general is very much on the line over all this and Sepp Blatter's credibility in particular is on the line," Robertson told the Guardian. "This would be a welcome first sign of openness and transparency. But there is a lot further to go than this and what they need is widespread reform of the whole system."

The release of the documents, held by a court in the canton of Zug after Fifa lawyers paid 5.5m Swiss francs to settle a case in June last year, has twice been blocked by the governing body.

According to the BBC's Panorama, the longstanding Fifa executive and 2014 World Cup chief Ricardo Teixeira and the former Fifa president Joao Havelange both received payments from ISL.

Paraguay's Fifa member, Nicolas Leoz, was named in court as having received $130,000 from the company and Panorama later alleged he received further payments. All three men deny the allegations.

Blatter's other proposed reforms include making the ethics committee more independent, introducing a "solutions committee" to oversee reform and reform of the executive committee itself to ensure that members meet a "fit and proper" test before they are allowed to join.

The Fifa president, who has been in post for 13 years and was re-elected unopposed amid a slew of corruption allegations in June, has a long way to go to convince sceptical observers that he is serious about introducing meaningful change.

But he also faces the challenge of having to get the reforms approved by the executive committee, some of whom still believe the corruption allegations are fuelled by the British media.

In August, Transparency International said Fifa should appoint an independent group of football officials and independent experts to implement a reform plan and called for term limits for senior officials.

The Uefa president, Michel Platini, has called a summit of the eight European Fifa executive committee members, who make up a third of the board, ahead of Thursday afternoon's main meeting.

Northern Ireland's Jim Boyce, Britain's representative on the committee who took over from Geoff Thompson in June, said the Europeans were determined that Fifa recovers from the damage to its reputation following the corruption scandals of the last 12 months.

Two Fifa members were banned last year following investigations by the Sunday Times, and this year the former presidential candidate Mohamed Bin Hammam was banned for life for bribery, with the vice-president Jack Warner resigning a month after being charged with the same offence. Both men deny the charges.

"I am very much looking forward to hearing of the measures that the president will announce, some of which he has already started putting in place, to make sure that Fifa restores its reputation throughout the world after the adverse publicity of the last 12 months," said Boyce.

"I believe that everyone in Europe at least will be singing from the same hymn sheet. The European Fifa members I have spoken to, and the Uefa executive committee members, are all of the same view as me that we want to ensure that Fifa moves forward in the right way."